Drawing instrument



Oct. 21 1924- O. BUTZ ET AL DRAWING INSTRUMENT Filed NOV- 8, 192] 2Sheets-Shea! 1 2 Sheets-Sheet 2 O. BUTZ ET AL DRAWING INSTRUMENT FiledNov. 8 1921 Oct. 21

ATT'oRNEYs.

Patented Get. 21, 1924.

UNITED STATES 1,512,015 PATENT- OFFICE.

OTTO BUTZ AND WILLIAIVI E. DREYER, 0F NEVVABK, NEW JERSEY.

DRAWING INSTRUMENT.

Application filed November 8, 1921.

T 0 aZZ whom it may concern:

Be it known that we, O'r'ro BU'rz and WILLIAM E. DRnYnR, both citizensof the United States, and residents of Newark, in the county of Essexand State of New Jersey, have invented new and useful Improvements inDrawing Instruments, of which the following is a. specification.

This invention relates in generalto drawing instruments and moreparticularly to an instrument of the nature of the panto-graph forcopying drawings and the like.

The objects of the invention are to provide an instrument of thecharacter described embodying novel features of. construction and whichcomprises a minimum number of simple parts whereby a drawing or the likecan be easily and accurately copied without complicated adjustments {toprovide such an instrument includinga tracing element and a scribingelement, and improved means for mounting said elements on a board orsupport so as to be movable in all directions and positively guided intwo directions at right angles to each other; to provide in such aninstrument means for adjusting said tracing and scribing elementsrelatively to the board or support to accommodate different sizes ofdrawings; to provide an instrument of this character including means foryieldingly holding said tracing and scribing ele ments against thedrawing surface. and to obtain other results and advantages as may bebrought out by the following description.

Referring to the accompanying drawings, in which like numerals ofreference indicate the same parts throughout the several views.

Figure 1 is a perspective view of a drawing instrument. constructed inaccordance with our invention showing the same in operation in copying adrawing;

Figure 2 is an enlarged fragmentary perspective view showing the mannerof using the instrument as a parallel ruler for forming letters;

Figure-3 is a plan view of the instrument;

Figure 4: is a fragmentary longitudinal sectional View of the member forsupporting the scribing instrument on the drawing board, taken on theline 44: of Fig. 8, and

Figure 5 is a transverse sectional view through the same, taken on theline 5-5 of Fig. 3.

In the embodiment of our invention shown in the drawings, the referencecharacter 1 designates a drawing board which may be Serial No. 513,781.

formed of any suitable material, and which is divided transversely intotwo similar spaces 2 and 3 to receive respectively a drawing or the like4 to be copied and the paper 5 upon which the copy is to be made, saidspaces being formed with corresponding squaring lines for properlypositionin the copying paper relative to the drawing o'be copied.

A substantially U-shaped bracket 6 is rigidly secured transversely ofthe board between the said spaces 2 and 3, the arms of said bracketbeing formed with alined openings 7 in which is freely longitudinallyslidably mounted a rod 8. A bridge-like member 9 is mounted on the rod 8by means of depending ears 10 formed with openings which receive the rod8, said member having frictional engagement with said rod so as normallyto move therewith, but being forcibly movable longitudinally of the rodfor the purpose of adjustment. The bridge-like member 9 is also formedwith a second pair of ears 11 arranged at substantially right angles tothe ears 10 and provided with alined openings having freely andlongitudinally slidably mounted therein a second rod 12, the said rodextending transversely of the rod 8 at substantially right anglesthereto. The end of the rod 12 overlying the space 2 is formed with alaterally projecting arm 13 in which is rigidly mounted a tracing point1 1 to engage the drawing to be copied, and the opposite end of said rod12 is formed with a laterally projecting arm 15 having a verticallydisposed sleeve 16 to receive a pencil or other scribing element 17, thesaid scribin element being removably clamped in said sleeve by suitableclamping means 18. A spring wire 19 has one end thereof rigidly securedto the member 9 at 20 and the other end thereof removably receivedwithin the returned hooked end 21 of the tracing point arm 13, asclearly shown in Figure 2, the said wire serving to maintain the tracingpoint and scribing element in yielding engagement w1th the drawing andcopying member 9 and the rod aanu both the rods 8 and 12"arelongitudinally movable simultaneously, as shown by dotted lines in Figure 3, sol-as to enablea curved or inclined line to be traced. When itis desired to move the scribing element from 'one'point on the paper toanother point without male ing a line, the scribing'elernent isliftedfrom the paper against the influence of the spring wire '19. Wheniris desired to apply the drawin 'andeopying aper to the board 1 tlie'springf wire 19m he slipped from the hooked end 21 of the tracingarm13,'and the said arm and the arm swung ba'ckwardly off of'thejs'paces2 and 3 into the position shoyvi' 'in d'otte d'lines' in Figure lheinstrument can'also be used as a parallel ruler, so as to enablevertical parallel lines to be drawngas 's'hownin Figure 2, this functionof the instrument being particularly adaptablef ifor itorming plainfletters. in such an operationfthe "scribing element 17 is forced iatemnyso as to move only the rod 8, the rod 12 beingjinoved longitudinallyonly to space the'parallel lines. I, V "Vhile wehaveshownfone 'possibleembodiment orour invention, it will be understood that this is onlyiorthe purpose of hastening the principles of the invention, and that many-11iodificati0ns and changes can he made in the detail'co-ns'truction ofthe instrument 'without I departing from the spatte scope of theinvention.

1 thus "described the invention, what we claim is: I '1. An instrumentof the character described including a support, a rodlongitudinallyfslidabl'e in said support, a "member mounted m aid rodnormally movable therewith and adjustable longitudinally hereof, isecond rod longitudinally slitlable in said member transversely of saidfirstmentioned rod, a tracing element carried at oneend'of saidSBCODCLHIGDtiODGCl rod, and a scilib'ing element mounted at the otherend oif said second mentionedrod.

'2. An instrument of "the character described including a support withspaced bearings, a ro'd longitudinally "slidable in saidsu'pp'ort,aniember between said bearings having a pair of spaced depending earsformedwith a'lined openings "to irictionally receive said rod so as tobe movable normally therewith and adjustable longitudinallythereof, saidmember being also fornied with another pair or ears having alinedopenings arranged at right angles to ment in said support'soas tobeniovab'le in all directions and positively" guided indirections atright angles to each other, a scribing element movable with said tracingelement, and means for yieldingly holding said tracing element inengagement with the drawing surface. i

l. An instrument of the character described including a support,'a-tracing element, means for mounting said tracing element in saidsupport so as to be movable in all directions and positively guided indirections at right angles to each other, a scribing element movablewith said tracing element, and means for yieldingly holding both saidtracing elementand said'-"scribi"'g element in engagement with thedrawing surface. 7 m

An vins'trun'ient of the' character described including a'support, rodlongitu'dinally slidable in saidsupport, a member mounted on said rodand movable therewith, a second rod rotatable and lon itudinallyslidable in said member transversely of said first-mentioned rod, atracing eminent-ri idly mounted on one end of said secondnientioned rod,ascribing element-rigidly mounted on the other end thereof, and yielding means engaging one oi said: elements to hold both in engagement withthe drawing surface. 1

6. An instrument ot the characterdescribed including a support, a rodlongitudinally slidable in said support, a member mounted on said'rodand movable therewith, a second rod rotatable and longitudinallyslidable in said-member transversely of sa'id first-mentioned rod,alateral arm rigid-1y connected to each end of said 'seconclnentionedrod, a scribing element mounted enene er said arms, a tracing elementmounted in the other of said armsfand yielding me a'ns 'engaging one ofsaid arms to hold both said scribing and tracing element's in engagementwith the drawing surface.

' or'ro BUTZ. j 3

WILLIAM DREYER;

